Calcining or decomposing furnace.



No. 726,911. ,PATENTBD MAY 5, 1903. W. HASENBAGH.

d CALGINING 0R DEGOMPOSING FURNACE. I AI'PLIOATION FILED un. 20. 1902; i no MODEL. v mums-sum 1. I

PATENTED MAY 5, 1903.. W. HASBNBAGH. GALGINING OR DEGOMPOSING FURNACE.

APPLICATION FILED APR. 28, 1902.

8 SHEETS-8HEET 2.

N0 MODEL.

PATENTED MAY 5, 1903.

W. HASENBAGH} OALGINING OR DEGOMPOSING FURNACE.

APPLIOATIUN FILED APR. 28, 1902.

8 SHEETS-SHEET 3.

no MODEL.

- NITED STATES Iatented May; 5, 190a.

ATENT lFFicE.

VVILI-IELM HASENBAOH, OF MANNHEIM, GERMANY, ASSIGNOR TO VEREIN OHEMISGHER FABRIKEN IN MANNHEIM, OF MANNHEIM, GERMANY.

CALCINING OR DECOMPOSING FURNACE.

SPECIFICATION forming part of Letters Patent No. 726,911, dated May 5, 1903.

Application filed April 28, 1902.

To all whom it may concern.-

Be it known that I, WILHELM HASENBAOH,

a subject of the German Emperor, residing and having my post-office address at Chemische Fabrik Wohlgelegen, Mannheim, Germany, have invented certain new and useful Improvements in Oalcining or Decomposing Furnaces, of which the following is a specification.

The construction of the mechanicallyworked calcining or decomposing furnaces and the like, and especially those with stationary muffies and rotating agitators, have the drawback that their maincomponents-via, the rnuffie and the hearth and agitator, re-

spectively-are liable to disarrange themselves in their respective positions, thereby giving rise to an interruption in the working of theplantowingtotheagitatorgettingjammed.- The reciprocal displacement of muffie and agitator and the jamming of-the latter thereby produced has in the hitherto-known constructions its cause in the fact that the brickwork of the oven is a constructional element which serves as a bearer and as a point of support both for the muffle and for the agitator, such element having a tendency to become deteriorated in course of working by the firegases and the influence of the material to be calcined.

For the above-explained reasons,- among the numerous constructions of mechanicallyoperated calcining or decomposing furnaces only those with rotating hearth and station- 5 ary agitator have found practical use, because inthis construction the hereinbefore described drawbacks do not exist in so high a degree as in those with a stationary calcininghearth and a rotating agitator.

The present invention now relates to a mechanically-operated muifie or calcining-oven in which the aforementioneddrawbacks are obviated by a particular arrangement of the main organs of the apparatus, (the muffle and the agitator,) inasmuch as they are so rigidly united to each other that'their relative or re ciprocate displacement becomes an impossibility.

In the subjoined, Figure 1 represents a plan of the oven, and Figs. 2 and 3 are vertical Serial No.105,069. (No model.)

sections thereof on the lines A B and C D of Fig.1.

By means of a casting B the muffle and hearth A, respectively, are secured in an iron framework D and united to the latter. The casting B serves at the same time for bearing the shaft of the agitator. In this construction the brickwork plays nov constructional part, but only serves as fire-channel and as means for maintaining the heat.

The main constituents of the mechanicallyoperated calcining-oven are the iron mufile or hearth A, the casting B, the agitator O, and the iron framework D.

The muffle A comprises the cup at with the hub 17, the mantle c, and the cover 01. The mantle cis provided with three cleaning-holes e, and the cover 01 with the depending scraper f, the inlet-pipe g, and the gas outlet or escape pipe g.

The casting B serves for rigidly uniting the muffle A with the iron framework D, and by means of. the stuffing-box It also acts as a guide for the shaft of the'agitator.

The agitator C, driven by belting or by gearing from an electric motor, comprises the agitator-shaft or Kings rod 2', the hub is, which fits over andis supported on the hub 17, the stirring-arms Z, and the scrapers m.

The calcining material lifted by an eleva- 8o tor is fed into the hopper n and conveyed by the Worm 0 through the pipe 9 into the muffle. Any material that may lodge on the agitator will be removed by the scraper f as the agitator is rotated beneath it.

Should the oven be intended to be used for producing sulfates, the pipe t may be employed for the admission of the required quantity of sulfuric acid. A continuous stirring of the calcining material is effected by the 0. agitator, and the finished product is fed continuously into transporting-trucks through the exit-pipep,provided with an automatic ob turator q. The gases are sucked off through the pipe 9. The fire gases preferably first 5.

come in contact with the cover and the mantle of the muffle, pass downward through the openings 1", then heat the cup, and finally pass through 5 to the chimney.

What I claim is 1. Acalciningor decomposing furnace comprising an iron framework, a hollow casting mounted on the framework for supporting the muiile and serving as a bearing for the shaft of the agitator, a muffle supported on the casting and having an inner hub, an agitator within the muffle supported by the said hub, a shaft for the agitator having a bearing in the hollow casting, and means for operating the agitator, substantially as described.

2. A calcining or decomposing furnace comprising an iron framework, a hollow casting mounted on the framework for supporting the muffle and serving as a bearing for the shaft 

